Mine-gate.



No. 739,978. PATENTED sFPT. 29,1903.

1N; K'. BOWMAN.

-MINE GATE.

APPLICATION FILED JAN. 13, 1903.

E0 MODEL. 2 SHEETS-SHEET 1.

No. 739,978. PATEN'TED SEPT. 29, 1'903.. I

N. K. BOWMAN.

MINE GATE.

APPLICATION FILED JAN. 13. 190s. No MODEL. z SHEETS-SHEET z.

:ns co. Pnnmumo.. wAsmNmon D c .5o nection with mine-gates on electric haulage Patented September 29, 1903.

PATENT OEE-ICE. i

NEWTON K. BOW'MAN, OF NORTH LAWRENCE, OHIO.

MINE-GATE.

SPECIFICATION forming part of Letters Patent No. 739,978, dated September 29, 1963.

Application filed January 13, 1903. Serial No- 138898. (No model.)

To all whom t may concern,.-

Beit known that I,- NEwToN K. BowMAN, a citizen of the United States, residing at North Lawrence, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Mine Gates, of which the following is a specification.

In the operation of upwardly-opening minegates on electric haulage-lines it is customary to jump the trolley when the gate is reached to clear the same. This is objectionable because of the vigilance and expertness re mounting the bridge are not essential within the purview of the invention so long as the power is uninterrupted. The invention consists of the-novel features, details of construction, and combinations of parts, which hereinafter will be more fully described,.claimed, and illustrated in' the drawings hereto attached, in which*- Figure l is a perspective view of a minegate equipped with the invention. Fig. 2 is a perspective view of the preferred form of bridge. Fig. 3 is a side elevation showing the gate open and the bridge spanning the same. Fig. 4 is a detail 'view of a modiiication, the bridge being composed of stationary approaches and an intermediate movable part. Fig. 5 is a perspective view of the form of bridge illustrated in'Fig. 4.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the'same reference characters.

The invention is adapted for use in con of any type or system in which the trolley is adapted to be interrupted either by the gate or other part capable 'of being spanned by a bridge, so as to preserve the continuity of the current and power essential on grades, particularly on ascending inclines.

The accompanying drawings illustrate the form of mine-gate forming the subject-matter of and disclosed in Patent No. 676,835, granted to me June 1S, 1901. vThe mine-gate l is a flexible curtain adapted to open by an upward movement and attached at its upper end to the cross-piece of a frame 2, said gate being provided at its lower end with a crossbar 3 to weight and stiffen the same. Pivoted arms 4 are firmly attached at their lower front ends to thel cross-bar 3 and when turned into the position about as shown in Fig. 3 open the gate. The gate-operating mechanism is substantially the same as shown in my patent herein referred to and is actuated by the car to positively open and close the' gate. The electric conductor or trolley-line is indicated at 5 and is arranged overhead and above the gate and the supporting-frame when folded or open, as shownin Fig. 3, is curved, its end portions being forked, as indicated at 7, to embrace opposite sides of the trolley-line and prevent lateral displacement of the bridge, also to insure proper positi0n.

ing thereof when the gate is opened. This bridge is attached to the cross bar 3 and is movable therewith. As shown, studs 9 are secured to the bridge and project upward therefrom to receive between their upper ends cross-bar 3, which is rigidly connected vthereto by any suitable fastening means.

When the gate is open, as indicated inv Fig. 3, the bridge spans the same and carries the trolley-wheel thereby without any attention on the part of the operator, and when. the gate is closed, as shown in Fig. 1, the bridge occupies a position substantially vas indicated 75 therefor. VThe bridge 6 for spanning the gate whereas the parts 7 are secured to the trolleyline 5 in any substantial way. In either form of the bridge the terminal portions are deiiected, one serving to direct the trolleywheel away from the trolley-line and the other permitting the trolley-wheel to gradually approach the trolley-line, as will be readily comprehended. The vital feature of the invention is a bridge for electric haulage-lines of mines to carry the trolley-wheel, shoe, or like part past the mine-gate when open, so as to obviate interruption of the current.

Having thus described the invention, what is claimed as new isl. In electric haulage lines or systems for mines, and in combination with the trolleyline and mine-gate, a bridge for spanning the gate or like part to carry the trolley-wheel thereby without necessitating the interruption of the electric circuit or power, substantially as set forth.

2. In electric haulage lines or systems for mines, and in combination with the gate and trolley-line, a bridge for spanning the gate when open and carried thereby to prevent interruption of the power, substantially as set forth.

3. In electric haulage lines or systems for mines, and in combination with the trolleyline and mine-gate, a bridge for spanning the gate when open, said bridge comprising an intermediate and terminal portions, the latter being oppositely deected and adapted to make electric connection with the trolley-line at each side of the gate, substantially as set forth.

4. In electric haulage lines or systems for mines, and in combination with the trolleyline and mine-gate, a bridge attached to and carried by the mine-gate and movable therewith and having its terminal portions constructed to make interlocking connection with the trolley-line to prevent lateral displacement, substantially as set forth.

In testimony whereof I aiiix my signature in presence of two witnesses. f

NEWTON K. BOVVMAN. [11. 8.]

Witnesses LUCRETIA DAWSON, JOHN PoLLocK. 

